Chain driving-belt.



J. E. DUKBLOW.4 CHAIN DRIVING BELT. APPLICATION FILED NOV. 27, 1906.

921,095, Patented May 11, 1969.

UNITED sTArEs PATENT OFFICE.

Joan n. DUKELow, or calorico, iLLnvois.

CHAIN DRIVING-BELT.

' To all 'whom it may concern:

`connected to the metal Be it known thatl, JOHN E. DUKELOW, a citizen of the United States, residing at Chicago, county ofiCook, and State of Illinois, have invented certain new and useful Improvements in Chain Driving-Belts, of which the following is a description.

My invention relates to means for transmitting power between pulleys or sheaves having suitably formed faces, and positioned substantially in the same plane.

The object of my invention is to provide a power transmitter which is substantially unaffected by moisture or variations in tem erature, and which while engaging the pullieys or sheaves with a'suitably positive grip, is practically free from any tendency to stretch or become distorted under `a load or when subjected to severe usage.

'lo this end my invention consists in the novel construction, arrangement, and combination of parts herein shown and described, and more particularly pointed out in the claims.

ln the accompanying drawmgs, wherein like or similar reference characters' indicate like or corresponding iarts; Figure 1 is a side elevation of a single link of my device. Fig. 2 is a plan view of a' link and portions of adjacent links at its opposite ends. Fig. 3 is an end view of a link. Fig. 4 is a side elevation showingr several links connected. F 5 is a perspective view of the cushioned portion of a llnk; and Fig. 6 is a viewshowing the preferred form of pulley rim adapted to co erate with the form of my device shown in t e drawings.

My device consists essentially of a plurality of pivotally connected links each cemprising a metal part 1, and a cushion 2, rigidly art and formed to, engage the face of the pu ley or sheaves upon which the device isto o crate. The several metal parts are pivotal y connected to each other at their extremities and bear all the driving strain, while the cushion parts merely engage the faces of the pulleys to transmit the driving effort from the driving pulley to the chain, and from the chain tothe driven pulley, and have no part in the transmission of the power when not in contact with one or the other ofthe pulleys.

In the form shown the central portion of the metal art is substantiall rectangular in section an slightly curved W 'le its extremities 3, and 4, are suitably enlarged to copvSpecification of Letters Patent.

Application filed November 27, 1906.

Patented May 11, 1909.

Serial No. 345,338.

erate with the adjacent links and form a pivotal or hinged connection between their y angles to the face of the link for a purpose which will be hereinafter explained.

'l he end 3 is suitably reduced in width to form the central member of a hinge joint and provided with an opening` 6 to receive a suitable pin 7. The end 4 is forked to cooperate with the end 3 of a second link, the two sides being each provided with an opening 6 and suH'iciently separated to receive the end 2% between them, and each of sufficient width to ill the offset upon the opposite sides of the end 3 thereby providing, When several links are connected,a chain of substantially uniform width.

The cushion 2 may be formed of any suitable substance, such for example, as leather, rubber, fiber or the like, and is suitably formed to snugly iit between the shoulders 5-*5 and against the back of the metal part 1. The portions 8--8 on opposite sides of the metal party roject so as to substantially inclose the meta part 1 upon its face and both edges. The coperating faces of the metal part and cushion thus interlock to prevent both transverse and longitudinal movement between the parts of the link. The outer faces of the cushion 2 are preferably formed to accurately fit the groove in the face of the sheave types of power transmitting devices.

he cushions 2 may be attached to the metal part 1 in any desired manner. As shown suitable screws 10-10 are provided passing through suitable openings 11-11 in the cushion 2 and enga ing suitably threaded o enings in the meta part 1.

T e shoulders 55 preferably are of sufficient size to, engage the cushion part 2 near its extremities and hold the same against lonitudinalmovement upon the metal part, 'reieving the screws 10-10 from substantially all stress except merely that required to hold the vmetal art 1 and cushion 2 in suitable contact. he extremities 3 and 4 are also well nown wedging action common in many bent inward or otherwise formed to bring the pivotal connection between the links intermediate the faces and backs ofthe cushions and preferably as near the faces 9 as possible, so that the longitudinal strain between the metal part and cushion has very little tendency to tear these parts from each other.

all the desirab e features of a rubber or leather belt but entirely free from the variations in tension incident to changes of temperature, 'and moisture, in the atmosphere and also, by providing the shoulders 5-5 to practically4 receive all the strain incident to transmitting the power from the cushions to the metal arts and by having the pivotal connection etween the links brought as near to the face 9 of the cushion as possible, freed from the disagreeable tendency common to devices of this character viz., metal chains with cushion friction surfaces, of pulling the cushions from the metal arts.

Having thus describe my invention it is obvious that various immaterial 1nodifications may be made in my device without departing from the spirit of my invention,

ence l do not Wish to be understood as limiting myself to the exact form and construction shown.

lWhat l claim as new, and desire to secure by Letters Patent is:-

i. In a device of the kind described, a plurality of pivotally connected links,.each com rising -a metal part provided with a shou der at each end, land a cushion having a longitudinal recess in its back adapted to receive said metal part, and coperating with said shoulders to prevent longitudinal movement between said cushion and metal part.

2. ln a device of the kind described, a plurality of pivotally connected links each comprising a metal part, and a cushion having a longitudinal recess in its back adapted to receive said metal part, the proximate faces of said metal part and cushion being formed to interlock to prevent either transverse or longitudinal movement therebetween.

3. In a device of the kind described, a plurality of pivotally connected links, each cornprising a metal part and a cushion said metal art being bent inward at its extremities ringing the pivotal connections between the links intermediate the faces and backs of said cushion. i

` 4. In a device of the kind described, a plurality of pivotally connected links, each comrising a metal part and a cushion having a ongitudinal recess formed in its back to re- V ceive said metal part, said metal part having a shoulder formed at each end thereof havin their proximate faces substantially paralle and ada ted to receive a portion of said cushion etween them to control the longitudinal position of said cushion" upon said metal part.

of In a device of the kind described, a plurality of pivotally connected links each comrising a metal part and a cushion having a ongitudinal recess formed in its back to receive said metal part, said metal part having a shoulder formed at each end thereof havin their proximate faces substantially paralle and ada ted to receive a portion of said cushion etween them to control the longitudinal position of said cushion upon said metal part, and the pivotal connection between said links positioned intermediate the faces and backs of said cushion.

6. ln a device of the kind described, a plurality of pivotally connected links, each comprising a metal part and a cushion, said metal part being partially inclosed by said cushion and having its extremities bent inward forming shoulders engaging said cushion near its extremities, and brin g the pivotal connections between the 'nks intermediate the faces and backs of said cushions.

JOHN E. DUKELOW.

Witnesses:

B. P. WALwoRTH, F. L. ZEBLEY. 

